阅读说明：本技术 一种新型环保可降解pvc人造革及其生产工艺 (Novel environment-friendly degradable PVC artificial leather and production process thereof ) 是由 顾跃进 于 2020-12-28 设计创作，主要内容包括：本发明公开了一种新型环保可降解PVC人造革及其生产工艺,包括羟肟化聚氯乙烯、改性滑石粉、腐败苹果、柠檬酸、黄原胶、氯化铜、织物底基、合成树脂、增塑剂、偶联剂、抗皱剂。羟肟化聚氯乙烯同时含有羰基和肟基,提高组分之间的相相容性,降解时形成的小分子碳化合物可以吸引枯草杆菌,促进羟肟化聚氯乙烯的降解。滑石粉能够改善树脂的触水耐受性；柠檬酸改性滑石粉增加合成树脂的韧度和拉伸强度；植物甾醇与柠檬酸生成植物甾醇酯作为人造革表皮膜,其良好的疏水疏油性使得合成的人造革兼具防水防油的效果。废弃苹果制备人造革的制造工艺在节约资源的同时保护了环境,增加废弃苹果的附加产值。(The invention discloses novel environment-friendly degradable PVC artificial leather and a production process thereof. The hydroximated polyvinyl chloride contains carbonyl and oxime groups at the same time, so that the phase compatibility among the components is improved, and the small molecular carbon compound formed in the degradation process can attract bacillus subtilis and promote the degradation of the hydroximated polyvinyl chloride. The talcum powder can improve the water contact tolerance of the resin; the toughness and tensile strength of the synthetic resin are improved by the citric acid modified talcum powder; phytosterol ester is generated by phytosterol and citric acid and used as the surface leather membrane of the artificial leather, and the synthetic artificial leather has the waterproof and oilproof effects due to good hydrophobic and oleophobic properties of the artificial leather. The manufacturing process for preparing the artificial leather by using the waste apples has the advantages of saving resources, protecting the environment and increasing the additional output value of the waste apples.)

1. The novel environment-friendly degradable PVC artificial leather is characterized by comprising the following raw materials in parts by weight: 6-10 parts of hydroximated polyvinyl chloride, 5-15 parts of modified talcum powder, 80-100 parts of rotten apples, 10-15 parts of citric acid, 15-18 parts of xanthan gum, 5-6 parts of copper chloride, 30-50 parts of fabric substrate, 60-100 parts of synthetic resin, 10-15 parts of plasticizer, 10-15 parts of coupling agent and 10-15 parts of anti-wrinkle agent.

2. The novel environment-friendly degradable PVC artificial leather according to claim 1, which is characterized in that: the hydroximated polyvinyl chloride is prepared by grafting hydroximic acid and polyvinyl chloride in a free radical chain transfer mode under the catalysis of tetrahydrofuran.

3. The novel environment-friendly degradable PVC artificial leather according to claim 2, which is characterized in that: the xanthan gum is prepared by diluting a culture strain, precipitating with ethanol, and vacuum drying.

4. The novel environment-friendly degradable PVC artificial leather according to claim 3, characterized in that: the modified talcum powder is prepared by carrying out secondary modification on talcum powder by citric acid and phytosterol.

5. The novel environment-friendly degradable PVC artificial leather according to claim 4, is characterized in that: the fabric substrate is one of cotton fabric, polyester-viscose, polyester-nitrile and polyester.

6. The novel environment-friendly degradable PVC artificial leather according to claim 5, which is characterized in that: the phytosterol is one of stigmasterol, sitosterol, campesterol and brassicasterol.

7. The production process of the novel environment-friendly degradable PVC artificial leather is characterized by comprising the following specific steps of:

(1) preparing hydroximated polyvinyl chloride;

(2) preparing modified talcum powder;

(3) preparing pectin PVC artificial leather;

(4) evenly coupling hydroximized polyvinyl chloride on the fabric substrate, making the synthetic resin in the synthetic leather nexine, brushing the modified talcum powder of first layer after drying, making it dry naturally, brush the modified talcum powder layer of second layer and make it the film-forming, as outermost waterproof layer, make novel environmental protection degradable PVC synthetic leather through the compression.

8. The process for producing novel environment-friendly degradable PVC artificial leather according to claim 7, wherein in the step (1): adding 10g of polyvinyl chloride and 10g of hydroximic acid into a four-neck flask with a thermometer and a stirrer, heating to 120 ℃ while stirring, adding 5ml of tetrahydrofuran solution as a catalyst, carrying out heat preservation reaction for 2 hours, adding a sewage carbonic acid solution after the reaction is finished, stirring and neutralizing until the pH is 6.7, filtering, carrying out reduced pressure distillation on the product at 90 ℃, and carrying out vacuum degree of-0.1 Mpa, and removing unreacted monomers to obtain the hydroximized polyvinyl chloride.

9. The process for producing novel environment-friendly degradable PVC artificial leather according to claim 8, wherein in the step (2): preparing 10g of talcum powder into suspension, slowly heating and stirring, slowly dripping 3ml of citric acid solution into the suspension at the constant temperature of 60 ℃, stirring for 1h, drying and grinding at 120 ℃ to obtain the citric acid talcum powder, adding the citric acid talcum powder into absolute ethyl alcohol, adding 3ml of phytosterol, stirring for 3h at the temperature of 50 ℃, and drying to obtain the modified talcum powder.

10. The process for producing novel environment-friendly degradable PVC artificial leather according to claim 9, wherein in the step (3): selecting rotten apples, cleaning, peeling, removing kernels, cutting into blocks with proper size, blanching in 100 ℃ water for 3min, taking out, adding a mixed reagent of vitamin C and citric acid with a certain concentration as an aqueous solution of a composite color fixative, and soaking for a certain time to protect the color of the apples; putting the apple peel and the apple blocks into a pulping machine for pulping, and mixing the apple peel and the apple blocks in a ratio of 1: 1 percent mixing the slurry; adding a certain amount of pulp slurry into high maltose syrup and citric acid, mixing, adjusting pH to 5.0, vacuum concentrating for 5min, mixing xanthan gum and copper chloride according to the ratio of 5: 1, adding the composite adhesive, hydroximized polyvinyl chloride and a plasticizer when the concentration is close to the end point, uniformly stirring and concentrating until fruit pulp is pasty and scraping, uniformly spreading the fruit pulp on a toughened glass plate by 10mm, putting the fruit pulp into an oven at 80 ℃ for drying until the fruit pulp is tough and non-sticky, taking out the fruit pulp, taking the fruit pulp when the fruit pulp is hot, and cooling to obtain the pectin PVC artificial leather.

Technical Field

The invention relates to the technical field of PVC artificial leather, in particular to novel environment-friendly degradable PVC artificial leather and a production process thereof.

Background

The PVC artificial leather produced by the industry has larger polydispersity, the molecular weight is increased along with the reduction of the polymerization temperature, through the development for many years, the PVC artificial leather in China is very widely applied, the PVC artificial leather is widely applied to building materials, sealing materials, fibers and the like, the application proportion of the PVC material in bags and toys for children is also continuously improved, but the traditional PVC material is poor in degradability, the waste PVC material is treated into a great problem, the water resistance of the PVC material is not high, and the service life of the PVC artificial leather is greatly shortened. Therefore, it is necessary to design a novel environment-friendly degradable PVC artificial leather which is degradable, has a double-sided waterproof effect, and is safe and nontoxic.

Disclosure of Invention

The invention aims to provide novel environment-friendly degradable PVC artificial leather to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: a novel environment-friendly degradable PVC artificial leather comprises the following raw materials in parts by weight:

6-10 parts of hydroximated polyvinyl chloride, 5-15 parts of modified talcum powder, 80-100 parts of rotten apples, 10-15 parts of citric acid, 15-18 parts of xanthan gum, 5-6 parts of copper chloride, 30-50 parts of fabric substrate, 60-100 parts of synthetic resin, 10-15 parts of plasticizer, 10-15 parts of coupling agent and 10-15 parts of anti-wrinkle agent.

Preferably, the hydroximated polyvinyl chloride is prepared by grafting hydroximic acid and polyvinyl chloride in a free radical chain transfer form under the catalysis of tetrahydrofuran.

Preferably, the xanthan gum is prepared by diluting a cultured strain, precipitating with ethanol, and vacuum drying.

Preferably, the modified talcum powder is prepared by carrying out secondary modification on talcum powder by citric acid and phytosterol.

Preferably, the fabric substrate is one of cotton fabric, polyester-viscose, polyester-nitrile and polyester.

Preferably, the phytosterol is one of stigmasterol, sitosterol, campesterol and brassicasterol

The invention provides a production process of novel environment-friendly degradable PVC artificial leather, which comprises the following steps:

(1) preparing hydroximated polyvinyl chloride;

(2) preparing modified talcum powder;

(3) preparing pectin PVC artificial leather;

(4) evenly coupling hydroximized polyvinyl chloride on the fabric substrate, making the synthetic resin in the synthetic leather nexine, brushing the modified talcum powder of first layer after drying, making it dry naturally, brush the modified talcum powder layer of second layer and make it the film-forming, as outermost waterproof layer, make novel environmental protection degradable PVC synthetic leather through the compression.

Preferably, in the step (1): adding 10g of polyvinyl chloride and 10g of hydroximic acid into a four-neck flask with a thermometer and a stirrer, heating to 120 ℃ while stirring, adding 5ml of tetrahydrofuran solution as a catalyst, carrying out heat preservation reaction for 2 hours, adding a sewage carbonic acid solution after the reaction is finished, stirring and neutralizing until the pH is 6.7, filtering, carrying out reduced pressure distillation on the product at 90 ℃, and carrying out vacuum degree of-0.1 Mpa, and removing unreacted monomers to obtain the hydroximized polyvinyl chloride.

Preferably, in the step (2): preparing 10g of talcum powder into suspension, slowly heating and stirring, slowly dripping 3ml of citric acid solution into the suspension at the constant temperature of 60 ℃, stirring for 1h, drying and grinding at 120 ℃ to obtain the citric acid talcum powder, adding the citric acid talcum powder into absolute ethyl alcohol, adding 3ml of phytosterol, stirring for 3h at the temperature of 50 ℃, and drying to obtain the modified talcum powder.

Preferably, in the step (3): selecting rotten apples, cleaning, peeling, removing kernels, cutting into blocks with proper size, blanching in 100 ℃ water for 3min, taking out, adding a mixed reagent of vitamin C and citric acid with a certain concentration as an aqueous solution of a composite color fixative, and soaking for a certain time to protect the color of the apples; putting the apple peel and the apple blocks into a pulping machine for pulping, and mixing the apple peel and the apple blocks in a ratio of 1: 1 percent mixing the slurry; adding a certain amount of pulp slurry into high maltose syrup and citric acid, mixing, adjusting pH to 5.0, vacuum concentrating for 5min, mixing xanthan gum and copper chloride according to the ratio of 5: 1, adding the composite adhesive, hydroximized polyvinyl chloride and a plasticizer when the concentration is close to the end point, uniformly stirring and concentrating until fruit pulp is pasty and scraping, uniformly spreading the fruit pulp on a toughened glass plate by 10mm, putting the fruit pulp into an oven at 80 ℃ for drying until the fruit pulp is tough and non-sticky, taking out the fruit pulp, taking the fruit pulp when the fruit pulp is hot, and cooling to obtain the pectin PVC artificial leather.

Compared with the prior art, the invention has the following beneficial effects:

the method is characterized in that polyvinyl chloride is a universal plastic with the largest yield in the world and is widely applied, but the polyvinyl chloride has extremely poor degradability, and hydroximic acid and polyvinyl chloride are grafted in a free radical chain transfer mode under the catalysis of tetrahydrofuran to prepare hydroximized polyvinyl chloride; hydroximic acid forms a grafting point by attacking a hydrocarbon weak bond of a matrix polymer, and chain growth is carried out on the grafting point to form a branched chain; the hydroximic acid has an adsorption effect on metal ions, when the hydroximic acid is degraded, the hydroximic acid adsorbs the metal ions in soil and is attached to the surface of hydroximic polyvinyl chloride, the degradation of the hydroximic polyvinyl chloride is promoted by rust water generated by the rust of the metal ions, hydroximic acid ligand is introduced into the polyvinyl chloride, the structure of the hydroximic acid is stabilized, and the hydrolysis activity of the hydroximic acid is reduced; the hydroxamated polyvinyl chloride contains carbonyl and oxime groups at the same time, so that the phase compatibility among the components is improved, the phase separation is reduced, when microorganisms act on the hydroxamated polyvinyl chloride, the expressed diiron monooxygenase cuts a long polymer chain, C or chlorine atom side groups connected with chlorine atoms are separated to form conjugated olefins, a branched chain with a defect structure can reduce the stability of adjacent carbon sites, and the separated side groups can catalyze the degradation process and are continuously degraded by the diiron monooxygenase to form small-molecule carbon compounds; the micromolecular carbon compound can attract bacillus subtilis to gather, mucus produced during reproduction can cause electrochemical corrosion due to oxygen concentration, the degradation of hydroximized polyvinyl chloride is promoted, the bacillus subtilis with large quantity can attract the predation of the flagellates, and the flagella of the flagellates can corrode a carbon main chain by utilizing hydrogen generated by a bacterial biomembrane, so that the degradation of the hydroximized polyvinyl chloride is accelerated; after part of the small molecular carbon permeates into the ground, the carbon source is provided for microorganisms in the soil, the organic fertilizer amount is provided for the soil, and the soil barrenness is improved.

The outer layer of the artificial leather is generally synthetic resin, is a high molecular weight polymer, and can damage the original mechanical properties of the artificial leather when being directly contacted with water; the talcum powder can improve the water contact tolerance of the resin; the citric acid is used for carrying out surface modification on the talcum powder, so that the interface compatibility of the talcum powder and the synthetic resin can be improved, and the talcum powder can be uniformly dispersed on the surface of the synthetic resin and simultaneously the toughness and the tensile strength of the synthetic resin are increased when the talcum powder is coated on the surface of the synthetic resin; adding phytosterol for further modification, wherein phytosterol ester is generated by the phytosterol and citric acid and serves as an artificial leather surface membrane, the synthetic artificial leather has water-proof and oil-proof effects due to good water and oil repellency, the modified talcum powder has strong adsorbability on synthetic resin, and the modified talcum powder is firmly adsorbed on the surface of the synthetic resin under the synergistic effect of a plasticizer; the repeated modification of the talcum powder promotes the double-sided waterproof effect of the artificial leather, and the durability of the artificial leather is ensured to the maximum extent.

The pectin mainly contains methyl multivitamin-galacturonic acid, is a high molecular polymer of branched chain polysaccharide, is prepared from rotten apples, and has certain strength due to gelation for preparing leather; the xanthan gum and the copper chloride are uniformly mixed to prepare the composite gum, the hydroximized polyvinyl chloride and the plasticizer are added when the concentration of the apple pectin approaches the end point, and the addition of the xanthan gum is beneficial to the combination between pectin and xanthan gum molecules, increases the interaction force of hydrogen bonds, electrostatic attraction and van der waals force among the molecules, and generates good intersolubility among the pectin and xanthan gum molecules, so that the agglomeration degree of the apple leather is increased; the chelation of copper chloride to colloid is strong, hydroxyl in the molecular structure of pectin is neutralized by copper ions to form water-insoluble pectin salt, the pectin yield is high, and thus the coagulation degree of the apple leather is increased; finally, drying the concentrated pulp paste to be in a tough and non-sticky skin shape, and cooling to obtain the apple pectin leather; the process for preparing the artificial leather from the waste apples has the advantages of saving resources, protecting the environment and increasing the additional output value of the waste apples.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides the technical scheme that: a novel environment-friendly degradable PVC artificial leather comprises the following raw materials in parts by weight:

6-10 parts of hydroximated polyvinyl chloride, 5-15 parts of modified talcum powder, 80-100 parts of rotten apples, 10-15 parts of citric acid, 15-18 parts of xanthan gum, 5-6 parts of copper chloride, 30-50 parts of fabric substrate, 60-100 parts of synthetic resin, 10-15 parts of plasticizer, 10-15 parts of coupling agent and 10-15 parts of anti-wrinkle agent.

Preferably, the hydroximated polyvinyl chloride is prepared by grafting hydroximic acid and polyvinyl chloride in a free radical chain transfer form under the catalysis of tetrahydrofuran.

Preferably, the xanthan gum is prepared by diluting a cultured strain, precipitating with ethanol, and vacuum drying.

Preferably, the modified talcum powder is prepared by carrying out secondary modification on talcum powder by citric acid and phytosterol.

Preferably, the fabric substrate is one of cotton fabric, polyester-viscose, polyester-nitrile and polyester.

Preferably, the phytosterol is one of stigmasterol, sitosterol, campesterol and brassicasterol

The invention provides a production process of novel environment-friendly degradable PVC artificial leather, which comprises the following steps:

(1) preparing hydroximated polyvinyl chloride;

(2) preparing modified talcum powder;

(3) preparing pectin PVC artificial leather;

(4) evenly coupling hydroximized polyvinyl chloride on the fabric substrate, making the synthetic resin in the synthetic leather nexine, brushing the modified talcum powder of first layer after drying, making it dry naturally, brush the modified talcum powder layer of second layer and make it the film-forming, as outermost waterproof layer, make novel environmental protection degradable PVC synthetic leather through the compression.

Preferably, in the step (1): adding 10g of polyvinyl chloride and 10g of hydroximic acid into a four-neck flask with a thermometer and a stirrer, heating to 120 ℃ while stirring, adding 5ml of tetrahydrofuran solution as a catalyst, carrying out heat preservation reaction for 2 hours, adding a sewage carbonic acid solution after the reaction is finished, stirring and neutralizing until the pH is 6.7, filtering, carrying out reduced pressure distillation on the product at 90 ℃, and carrying out vacuum degree of-0.1 Mpa, and removing unreacted monomers to obtain the hydroximized polyvinyl chloride.

Preferably, in the step (2): preparing 10g of talcum powder into suspension, slowly heating and stirring, slowly dripping 3ml of citric acid solution into the suspension at the constant temperature of 60 ℃, stirring for 1h, drying and grinding at 120 ℃ to obtain the citric acid talcum powder, adding the citric acid talcum powder into absolute ethyl alcohol, adding 3ml of phytosterol, stirring for 3h at the temperature of 50 ℃, and drying to obtain the modified talcum powder.

Preferably, in the step (3): selecting rotten apples, cleaning, peeling, removing kernels, cutting into blocks with proper size, blanching in 100 ℃ water for 3min, taking out, adding a mixed reagent of vitamin C and citric acid with a certain concentration as an aqueous solution of a composite color fixative, and soaking for a certain time to protect the color of the apples. Putting the apple peel and the apple blocks into a pulping machine for pulping, and mixing the apple peel and the apple blocks in a ratio of 1: 1 percent the slurry was mixed. Adding a certain amount of pulp slurry into high maltose syrup and citric acid, mixing, adjusting pH to 5.0, vacuum concentrating for 5min, mixing xanthan gum and copper chloride according to the ratio of 5: 1, adding the composite adhesive, hydroximized polyvinyl chloride and a plasticizer when the concentration is close to the end point, uniformly stirring and concentrating until fruit pulp is pasty and scraping, uniformly spreading the fruit pulp on a toughened glass plate by 10mm, putting the fruit pulp into an oven at 80 ℃ for drying until the fruit pulp is tough and non-sticky, taking out the fruit pulp, taking the fruit pulp when the fruit pulp is hot, and cooling to obtain the pectin PVC artificial leather.

Example 1: novel environmental protection degradable PVC synthetic leather:

a novel environment-friendly degradable PVC artificial leather comprises the following components in parts by weight:

7 parts of hydroximated polyvinyl chloride, 8 parts of modified talcum powder, 85 parts of rotten apples, 11 parts of citric acid, 16 parts of xanthan gum, 5 parts of copper chloride, 30 parts of fabric substrate, 60 parts of synthetic resin, 10 parts of plasticizer, 10 parts of coupling agent and 10 parts of anti-wrinkle agent.

The production process of the PVC artificial leather comprises the following steps:

(1) preparing hydroximated polyvinyl chloride;

(2) preparing modified talcum powder;

(3) preparing pectin PVC artificial leather;

(4) evenly coupling hydroximized polyvinyl chloride on the fabric substrate, making the synthetic resin in the synthetic leather nexine, brushing the modified talcum powder of first layer after drying, making it dry naturally, brush the modified talcum powder layer of second layer and make it the film-forming, as outermost waterproof layer, make novel environmental protection degradable PVC synthetic leather through the compression.

Preferably, in the step (1): adding 10g of polyvinyl chloride and 10g of hydroximic acid into a four-neck flask with a thermometer and a stirrer, heating to 120 ℃ while stirring, adding 5ml of tetrahydrofuran solution as a catalyst, carrying out heat preservation reaction for 2 hours, adding a sewage carbonic acid solution after the reaction is finished, stirring and neutralizing until the pH is 6.7, filtering, carrying out reduced pressure distillation on the product at 90 ℃, and carrying out vacuum degree of-0.1 Mpa, and removing unreacted monomers to obtain the hydroximized polyvinyl chloride.

Preferably, in the step (2): preparing 10g of talcum powder into suspension, slowly heating and stirring, slowly dripping 3ml of citric acid solution into the suspension at the constant temperature of 60 ℃, stirring for 1h, drying and grinding at 120 ℃ to obtain the citric acid talcum powder, adding the citric acid talcum powder into absolute ethyl alcohol, adding 3ml of phytosterol, stirring for 3h at the temperature of 50 ℃, and drying to obtain the modified talcum powder.

Preferably, in the step (3): selecting rotten apples, cleaning, peeling, removing kernels, cutting into blocks with proper size, blanching in 100 ℃ water for 3min, taking out, adding a mixed reagent of vitamin C and citric acid with a certain concentration as an aqueous solution of a composite color fixative, and soaking for a certain time to protect the color of the apples. Putting the apple peel and the apple blocks into a pulping machine for pulping, and mixing the apple peel and the apple blocks in a ratio of 1: 1 percent the slurry was mixed. Adding a certain amount of pulp slurry into high maltose syrup and citric acid, mixing, adjusting pH to 5.0, vacuum concentrating for 5min, mixing xanthan gum and copper chloride according to the ratio of 5: 1, adding the composite adhesive, hydroximized polyvinyl chloride and a plasticizer when the concentration is close to the end point, uniformly stirring and concentrating until fruit pulp is pasty and scraping, uniformly spreading the fruit pulp on a toughened glass plate by 10mm, putting the fruit pulp into an oven at 80 ℃ for drying until the fruit pulp is tough and non-sticky, taking out the fruit pulp, taking the fruit pulp when the fruit pulp is hot, and cooling to obtain the pectin PVC artificial leather.

Example 2: novel environmental protection degradable PVC synthetic leather two:

a novel environment-friendly degradable PVC artificial leather comprises the following components in parts by weight:

9 parts of hydroximated polyvinyl chloride, 13 parts of modified talcum powder, 90 parts of rotten apples, 15 parts of citric acid, 16 parts of xanthan gum, 6 parts of copper chloride, 35 parts of fabric substrate, 73 parts of synthetic resin, 12 parts of plasticizer, 12 parts of coupling agent and 12 parts of anti-wrinkle agent.

The production process of the PVC artificial leather comprises the following steps:

(1) preparing hydroximated polyvinyl chloride;

(2) preparing modified talcum powder;

(3) preparing pectin PVC artificial leather;

(4) evenly coupling hydroximized polyvinyl chloride on the fabric substrate, making the synthetic resin in the synthetic leather nexine, brushing the modified talcum powder of first layer after drying, making it dry naturally, brush the modified talcum powder layer of second layer and make it the film-forming, as outermost waterproof layer, make novel environmental protection degradable PVC synthetic leather through the compression.

Preferably, in the step (1): adding 10g of polyvinyl chloride and 10g of hydroximic acid into a four-neck flask with a thermometer and a stirrer, heating to 120 ℃ while stirring, adding 5ml of tetrahydrofuran solution as a catalyst, carrying out heat preservation reaction for 2 hours, adding a sewage carbonic acid solution after the reaction is finished, stirring and neutralizing until the pH is 6.7, filtering, carrying out reduced pressure distillation on the product at 90 ℃, and carrying out vacuum degree of-0.1 Mpa, and removing unreacted monomers to obtain the hydroximized polyvinyl chloride.

Preferably, in the step (2): preparing 10g of talcum powder into suspension, slowly heating and stirring, slowly dripping 3ml of citric acid solution into the suspension at the constant temperature of 60 ℃, stirring for 1h, drying and grinding at 120 ℃ to obtain the citric acid talcum powder, adding the citric acid talcum powder into absolute ethyl alcohol, adding 3ml of phytosterol, stirring for 3h at the temperature of 50 ℃, and drying to obtain the modified talcum powder.

Preferably, in the step (3): selecting rotten apples, cleaning, peeling, removing kernels, cutting into blocks with proper size, blanching in 100 ℃ water for 3min, taking out, adding a mixed reagent of vitamin C and citric acid with a certain concentration as an aqueous solution of a composite color fixative, and soaking for a certain time to protect the color of the apples. Putting the apple peel and the apple blocks into a pulping machine for pulping, and mixing the apple peel and the apple blocks in a ratio of 1: 1 percent the slurry was mixed. Adding a certain amount of pulp slurry into high maltose syrup and citric acid, mixing, adjusting pH to 5.0, vacuum concentrating for 5min, mixing xanthan gum and copper chloride according to the ratio of 5: 1, adding the composite adhesive, hydroximized polyvinyl chloride and a plasticizer when the concentration is close to the end point, uniformly stirring and concentrating until fruit pulp is pasty and scraping, uniformly spreading the fruit pulp on a toughened glass plate by 10mm, putting the fruit pulp into an oven at 80 ℃ for drying until the fruit pulp is tough and non-sticky, taking out the fruit pulp, taking the fruit pulp when the fruit pulp is hot, and cooling to obtain the pectin PVC artificial leather.

Comparative example 1:

the preparation method of the common PVC artificial leather comprises the following steps: the synthetic resin and the sizing material are mixed evenly, the mixed sizing material is directly coated on the pretreated base cloth by a scraper, the base cloth enters a plasticizing box for gelation and plasticization, and then the finished product is obtained by the working procedures of embossing, cooling and the like.

Comparative example 2:

comparative example 2 was formulated as in example 1. The preparation method of the fish sausage is different from the preparation method of the example 1 only in that the step (1) is not carried out, and the rest preparation steps are the same as the example 1.

Comparative example 3:

the formulation of comparative example 3 was the same as example 1. The preparation method of the fish sausage is different from the preparation method of the example 1 only in that the step (2) is not carried out, and the rest preparation steps are the same as the example 1.

Test example 1

The example 1 and the comparative example 3 were compared for the tensile properties of PVC artificial leather, and the test results were as follows:

PVC Artificial leather type	Example 1	Comparative example 3
			Tensile strength/MPa	28.5	27.3

The tensile strength is one of the performances of the artificial leather, and as can be seen from the above table, the PVC artificial leather prepared in example 1 and the PVC artificial leather prepared in comparative example 3 show stronger tensile strength, which is higher by 6.4% than comparative example 3, and the difference between the two lies in that the modified talc powder is added into the PVC artificial leather prepared in example 1, which shows that the modified talc powder can make the talc powder particles uniformly dispersed on the surface of the synthetic resin, and simultaneously, the toughness and tensile strength of the synthetic resin are increased, and the service life of the PVC artificial leather is prolonged.

Test example 2

Example 1 and comparative example 2 were subjected to a PVC artificial leather degradation experiment. Taking the same soil source, and mixing respectively for 1cm²The PVC artificial leather prepared in example 1 and comparative example 2 was buried. The bacillus subtilis strain with the same weight is placed in an experimental culture dish, after the bacillus subtilis strain is cultured for 2 days at the constant temperature of 25 ℃, 10g of soil in the culture dish is respectively taken to prepare diluents with the same concentration, 1ml of the diluent is respectively taken out from each diluent and placed in a plate for 2 days, the number of colonies formed in each plate is recorded, and the experimental result is as follows:

PVC Artificial leather type	Example 1	Comparative example 2
			Number of Bacillus subtilis colonies	24CFU	17CFU

The number of bacterial colonies reflects the degradability of the PVC artificial leather, and as can be seen from the above table, the number of bacterial colonies of Bacillus subtilis in the component of example 1 is greater than that of the component of comparative example 2, and the difference between the bacterial colonies and the component of PVC artificial leather is that hydroximized polyvinyl chloride is added to the PVC artificial leather prepared in example 1, which indicates that the micromolecular carbon compound generated by the degradation of the hydroximized polyvinyl chloride can attract the Bacillus subtilis to gather and propagate, the degradation of the hydroximized polyvinyl chloride is accelerated, and after part of the micromolecular carbon permeates into the ground, a carbon source is provided for microorganisms in the soil, an organic fertilizer amount is provided for the soil, and the soil impoverishment degree is improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.